Pension Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Schedule of the Funded Status of the Non-U.S. Plans

The following sets forth the funded status of our plans and amounts recorded in Accumulated other comprehensive income (loss) as of the most recent actuarial valuations using measurement dates of December 31 ($ in millions):

	U.S. Pension Benefits				Non-U.S. Pension Benefits
	2020		2019		2020		2019
Change in pension benefit obligation:
Benefit obligation at beginning of year	$	35.2	$	30.9	$	328.0	$	262.5
Service cost	—		—		4.4		2.2
Interest cost	1.2		1.3		4.0		5.3
Employee contributions	—		—		1.2		0.9
Benefits paid and other plan costs	(1.9)		(1.2)		(6.1)		(8.1)
Actuarial loss (gain)	7.0		4.2		17.9		38.5
Amendments, settlements and curtailments	—		—		(2.3)		0.3
Plan acquisitions and other	5.7		—		—		25.1
Foreign exchange rate impact	—		—		24.7		1.3
Benefit obligation at end of year	47.2		35.2		371.8		328.0
Change in plan assets:
Fair value of plan assets at beginning of year	26.5		23.3		189.9		149.1
Actual return on plan assets	3.5		3.9		17.3		19.4
Employer contributions	1.2		0.5		10.6		10.3
Employee contributions	—		—		1.2		0.9
Amendments and settlements	—		—		(1.8)		(1.8)
Benefits paid and other plan costs	(1.9)		(1.2)		(6.1)		(8.1)
Plan acquisitions and other	—		—		—		17.8
Foreign exchange rate impact	—		—		13.3		2.3
Fair value of plan assets at end of year	29.3		26.5		224.4		189.9
Funded status	$	(17.9)	$	(8.7)	$	(147.4)	$	(138.1)

The difference between the accumulated benefit obligation and the projected benefit obligation as of December 31, 2020 and 2019 is immaterial.

	U.S. Pension Benefits				Non-U.S. Pension Benefits
	2020		2019		2020		2019
Amounts recorded in the Consolidated Balance Sheets as of December 31
Other assets	$	—	$	—	$	6.3	$	5.3
Accrued expenses and other current liabilities	(0.5)		—		(4.0)		(3.7)
Other long-term liabilities	(17.4)		(8.7)		(149.7)		(139.7)
Net amount recorded	$	(17.9)	$	(8.7)	$	(147.4)	$	(138.1)

	U.S. Pension Benefits				Non-U.S. Pension Benefits
	2020		2019		2020		2019
Amounts recorded in AOCI as of December 31
Prior service cost	$	—	$	—	$	2.9	$	3.5
Actuarial loss	6.8		1.8		99.6		90.5
Total recorded in AOCI, before tax	$	6.8	$	1.8	$	102.5	$	94.0

Schedule of Weighted Average Assumptions Used

Weighted average assumptions used to determine benefit obligations at date of measurement

	U.S. Pension Plans				Non-U.S. Pension Plans
	2020		2019		2020		2019
Discount rate	2.40	%	3.37	%	0.99	%	1.40	%
Rate of compensation increase	N/A		N/A		2.36	%	2.45	%

Weighted average assumptions used to determine net periodic pension cost at date of measurement

	U.S. Pension Plans						Non-U.S. Pension Plans
	2020		2019		2018		2020		2019		2018
Discount rate	3.26	%	4.40	%	3.73	%	1.38	%	2.28	%	2.12	%
Expected return on plan assets	4.86	%	5.75	%	5.75	%	2.82	%	3.41	%	3.37	%
Rate of compensation increase	N/A		N/A		N/A		2.44	%	2.61	%	2.34	%

Schedule of Net Periodic Pension Costs

Components of net periodic pension cost

The following sets forth the components of net periodic pension cost for our plans for the years ended December 31 ($ in millions):

	U.S. Pension Benefits						Non-U.S. Pension Benefits
	2020		2019		2018		2020		2019		2018
Service cost	$	—	$	—	$	—	$	4.4	$	2.2	$	1.0
Interest cost	1.2		1.3		1.2		4.0		5.3		5.3
Expected return on plan assets	(1.3)		(1.3)		(1.4)		(5.4)		(5.5)		(5.4)
Amortization of net loss	—		—		—		4.1		2.5		2.4
Amortization of prior service cost	—		—		—		0.3		0.2		—
Net curtailment and settlement loss recognized	—		—		—		(0.5)		0.2		0.9
Net periodic pension cost	$	(0.1)	$	—	$	(0.2)	$	6.9	$	4.9	$	4.2

Schedule of Fair Value of Pension Plan Assets

The fair values of our pension plan assets as of December 31, 2020, by asset category were as follows ($ in millions): 

	Quoted Prices in Active Market (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash and equivalents	$	5.4	$	—	$	—	$	5.4
Mutual funds	—		30.8		—		30.8
Insurance contracts	—		27.8		—		27.8
Total	$	5.4	$	58.6	$	—	$	64.0
Investments measured at NAV(a):
Mutual funds							155.1
Real estate funds							15.2
Other private investments							19.4
Total assets at fair value							$	253.7
(a) The fair value amounts presented in the table above are intended to permit reconciliation of the fair value hierarchy to the total fair value of plan assets.

The fair values of our pension plan assets as of December 31, 2019, by asset category were as follows ($ in millions):

	Quoted Prices in Active Market (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash and equivalents	$	3.0	$	—	$	—	$	3.0
Equity securities:
Common stock	6.1		—		—		6.1
Preferred stock	1.7		—		—		1.7
Fixed income securities:
Corporate bonds	—		8.2		—		8.2
Government Issued	—		2.7		—		2.7
Mutual funds	—		25.9		—		25.9
Insurance contracts	—		1.9		—		1.9
Total	$	10.8	$	38.7	$	—	$	49.5
Investments measured at NAV(a):
Mutual funds							154.9
Other private investments							12.0
Total assets at fair value							$	216.4
(a) The fair value amounts presented in the table above are intended to permit reconciliation of the fair value hierarchy to the total fair value of plan assets.

Schedule of Expected Benefit Payments

The following sets forth benefit payments to participants, which reflect expected future service, as appropriate, expected to be paid by the plans in the periods indicated ($ in millions):

	U.S. Pension Plans		Non-U.S. Pension Plans		All Pension Plans
2021	$	2.1	$	12.2	$	14.3
2022	2.1		13.5		15.6
2023	2.2		12.4		14.6
2024	2.3		12.8		15.1
2025	2.3		13.0		15.3
2026-2030	11.9		67.2		79.1